iC-LFS

32x1 LINEAR IMAGE SENSOR

Rev A2, Page 8/10

SNH

SNH32

NRCI

Integration Time

35

Pix32

Pix31

...

Pix31

Pix32

Pix30

31

Pix1

1

32

3

V(AO)

CLK

SI

Pix2

Pix3

30

33

34

31

32

2

4

...

Pix1

Figure 6: Clock pulse continued without giving a new integration start signal

Operation with the shutter function

Integration can be halted at any time via pin DIS, i.e. the

photodiodes are disconnected from their corresponding

integration capacitor when DIS is high and the current

integration capacitor voltages are maintained. If this pin

is open or switched to GND the pixel photocurrents are

summed up by the integration capacitors until the next

successive SI signal follows.

PIX SAMPLE−C

5

6

DIS

Integration

Integration

Disabled

Disabled

Integration

Enabled

SNH

1

NRCI

2

...

1

4

SI

CLK

3

32

31

Figure 7: Defining the integration time via shutter input DIS

External bias current setting

In order to reduce the power consumption of the device

an external reference current can be supplied to pin

RSET which reduces the maximum readout frequency,

however. To this end a resistor must be connected

from VCC to RSET. If this pin is not used, it should be

connected to GND.